Debias: Cognitive Biases Quiz

Do you think you see the world clearly? Your brain runs on shortcuts, and those shortcuts quietly shape every decision you make.

Debias is a cognitive bias trainer, not just another reference list. Learn the 188 cognitive biases that distort judgment, test yourself on nearly 19,000 real-world scenarios, and log your own decisions to see which biases keep showing up in your thinking.

🎯 WHAT MAKES DEBIAS DIFFERENT

Most cognitive bias apps hand you a list to read. Debias gives you practice, feedback, and a record of your own thinking.

🔍 QUIZ YOURSELF - 18,869 SCENARIOS
Work through realistic situations built from all 188 cognitive biases. Track your accuracy, watch your score climb, and turn passive reading into knowledge that actually sticks.

🧠 REFLECT ON REAL DECISIONS
Log a decision you are facing - a job offer, a big purchase, a project deadline - and check it against the biases most likely to be at work. Sunk cost fallacy. Planning fallacy. Optimism bias.

⚡SEE YOUR PATTERNS
Your reflection history shows which cognitive biases you lean on most. Revisit past decisions, watch your self-awareness improve, and build genuinely clearer thinking over time.

🔍EXPLORE 188 COGNITIVE BIASES
Built around the Cognitive Bias Codex and organized into four core categories: too much information, not enough meaning, the need to act fast, and what we should remember. Browse the bias wheel, filter by category, or search full text to find any bias in seconds.

CLEAR EXPLANATIONS, NO JARGON
Every cognitive bias comes with a plain-language definition and a real-world example, so the concept is memorable instead of abstract.

SAVE WHAT MATTERS
Bookmark the biases you want to work on and come back to them anytime.

WHO IT IS FOR

Cognitive biases affect everyone who makes decisions. Debias is built for:

- Students of psychology, behavioral economics, and decision science
- Investors and analysts who need to check their own reasoning
- Managers and founders making high-stakes calls
- Designers and researchers who want to understand user behavior
- Anyone who wants to think more clearly and assume less

WHY IT MATTERS

Learning to recognize cognitive biases helps you make better and more rational decisions, argue more honestly, avoid expensive thinking errors, and understand why people - including you - behave the way they do.

Understand more. Assume less. Download Debias and start training your thinking today.

Recent changes:
Quiz results now link straight from each wrong answer to the bias behind it, and there's a Rate this app row in your profile. Reviews genuinely shape what gets built next.